What term is used for sheep that are over two years of age?

The term used for sheep that are over two years of age is "mutton." Mutton refers specifically to the meat from adult sheep, distinguishing it from lamb, which comes from sheep that are less than one year old. This distinction is important in the meat industry, as the age of the sheep affects the flavor and texture of the meat.

Lamb is derived from younger sheep and is sought after for its tenderness and specific flavor profile, while mutton tends to have a stronger taste and a firmer texture, which some people prefer. Other terms like ewe and ram refer to the sex of the sheep; a ewe is a female sheep, and a ram is a male sheep. Neither of these terms indicates the age of the animal, making "mutton" the correct term for sheep over two years old.